1 /*******************************************************************************
7 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
9 This program is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free Software
11 Foundation; either version 2 of the License, or (at your option) any later
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 You should have received a copy of the GNU General Public License along with
20 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21 Place - Suite 330, Boston, MA 02111-1307, USA.
23 Further information about the GNU General Public License can also be found on
24 the world wide web at http://www.gnu.org.
27 --------------------------------------------------------------------------------
30 ********************************************************************************
32 *******************************************************************************/
34 #ifndef FGATMOSPHERE_H
35 #define FGATMOSPHERE_H
37 /*******************************************************************************
39 *******************************************************************************/
43 /*******************************************************************************
44 COMMENTS, REFERENCES, and NOTES
45 *******************************************************************************/
47 The equation used in this model was determined by a third order curve fit using
48 Excel. The data is from the ICAO atmosphere model.
49 @memo Models the atmosphere.
52 /*******************************************************************************
54 *******************************************************************************/
58 class FGAtmosphere : public FGModel
61 // ***************************************************************************
63 @param FGFDMExec* - a pointer to the "owning" FDM Executive
65 FGAtmosphere(FGFDMExec*);
67 // ***************************************************************************
72 // ***************************************************************************
73 /** This must be called for each dt to execute the model algorithm */
76 // ***************************************************************************
77 /** @memo Returns the air density
78 @return float air density in slugs/cubic foot
80 inline float Getrho(void) {return rho;}
88 /******************************************************************************/